Question

Lab 12 Substitution and Elimination Reactions: Unimolecular Elimination

QUESTIONS:

1) At the end of the experiment, which of the following can go into the organic waste container?

I. Excess cyclohexane

II. Excess cyclohexene

III. Anhydrous magnesium sulfate

            I, II and III

            I and II only

            I only

            II only

2) The "1" in SN1 and E1 stands for?

            The rate only depends on one species.

            The mechanism has one step.

            The rate depends on two species.

3) Why is it necessary to add anhydrous magnesium sulfate to your distillate?

            To aid in recrystallization.

            To remove any excess protons from solution.

            It re-protonates the final product.

            The distillate is an azeotrope with water

4) What will the major product of an E1 reaction with 2-methyl-3-pentanol be?

            5-methyl-6-pentane

            4-methyl-3-pentene

            4-methyl-2-pentene

            2-methyl-2-pentene

Answer 1

1) At the end of the experiment, which of the following can go into the organic waste container?

I. Excess cyclohexane

II. Excess cyclohexene

III. Anhydrous magnesium sulfate

            I, II and III

           I and II only (correct)

            I only

            II only

2) The "1" in SN1 and E1 stands for?

            The rate only depends on one species. (correct)

            The mechanism has one step.

            The rate depends on two species.

3) Why is it necessary to add anhydrous magnesium sulfate to your distillate?

            To aid in recrystallization.

            To remove any excess protons from solution.

            It re-protonates the final product.

           The distillate is an azeotrope with water (correct)

4) What will the major product of an E1 reaction with 2-methyl-3-pentanol be?

            5-methyl-6-pentane

            4-methyl-3-pentene

            4-methyl-2-pentene

            2-methyl-2-pentene (correct, most substituted alkene as major product)